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  1. 2006 Rainier HVAC - No air from front vents

    The "How-To" and DIY Section
    I own a 2006 Buick Rainier CXL with the 5.3L V8. Had an intermittent issue with no A/C air coming from the front vents, only side and floor. Used to fix it by turning off the HVAC, waiting a few seconds and turning on AUTO. Now it's failed completely - no air at all. I get cool air from the...
  2. HVAC Servomotor Clicking.....

    General
    First, I had to remove both right rear seat seatbelt anchors on the C&D pillars to take off the pillar trim pieces that overlap the heater panel. I think there were 5 Phillips screws and a bunch of push-in retainers.... then the whole right rear inner panel came out (somewhat) fairly easily...
  3. Rear HVAC troubleshooting help

    OEM Issues
    I have a 2003 trailblazer ext. My issue is that I am replacing the actuators currently and they work just fine now after a reset but the vents don't put out any heat. I've gone below and felt the coolant lines, they seem to be warm and the ac lines seem to be cold. The issue was present before...
  4. Driver Side HVAC Actuator

    General
    Hi, first I'm new in there and I'm grateful for the forum community. i have trailblazer 08 that started blowing hot air from passenger side and cold air from passenger side when turning A/C on.:crazy: i tried all the calibration, battery off but it seems that i need to change the actuator...
  5. HVAC Issues

    General
    So I'm at a loss. My HVAC has the following list of issues: The air is blowing out of all vents. It is set on floor, and if you hit the mode button it will start clicking behind the dash. However, it still blows full out of the vent and defrost. In other words, when I don't want it coming...
  6. Hvac nightmare

    Introductions
    Hello everyone! I'm the proud owner of a 5.3L chevy trailblazer LTZ (2008) So far, the best car I ever had. Believe it or not, my main concern with it is the mighty HVAC system. At the moment I'm trying to access the actuator that controls the front vents. I know for sure that the "high quality...
  7. Blower Motor Amp Draw specs

    General
    Hi TB Gurus, I've been looking over the forum, here, there and everywhere and can't find what I'm looking for. I suspect my blower motor is failing, causing extra draw, causing resistor to fail. Wires are discolored but not melted (yet). I've got a 2005 TB EXT, LS with dual temp climate control...
  8. HVAC Issue

    OEM Issues
    If my Freon leaked down would that stop the heat from working? A little back story. About 2 weeks ago driving along with a/c on. Had a foul smell inside the passenger compartment, after a minute or two the air stopped. I'm going to guess that the smell was a Freon leak, didn't smell electrical...
  9. Very quick and simple possible solution for HVAC control and Calibration

    The 02-09 "How-To" and DIY Section
    I'm hoping this will help a few folks with HVAC/calibration issues. I recently had the control module to my heater motor fry. Upon fixing it I quickly realized I had other issues. The HVAC unit would only blow hot air on my feet and it would not switch to any other position. I went through many...
  10. Hvac issues

    The 02-09 "How-To" and DIY Section
    The blower motor in my 2005 trailblazer quit working. I went through and found that the harness was cooked on one wire and the resistor was shot so I went to the dealer and bought a new one. I went to the dealer because I found many different kinds out there and they confused me a bit. The...
  11. Air Conditioning Issues

    General
    2006 Saab 9-7x 4.2i We started noticing the issue on a road trip where we were driving 10 hrs/day. It's likely the issue was occurring before that but we didn't notice because it only got driven 10-15 minutes at a time. When we first started driving the A/C was strong and cold. The further we...
  12. Annoying clicking from under dash.

    General
    Truck started making an annoying sound a week or two ago and I thought it was the blower. After finally deciding to check it out, I discovered it's actually not the blower making the noise. I'm 85% sure it's some component jammed way up in the dash that I have no idea what is. It looks like...
  13. AC Not cooling…Freon leak

    General
    Thinking I was low on freon, I bought a can of 134A and added some freon to my system. My AC was still blowing warm air out. Three weeks ago, I took my SS to the dealership and they charged me $160 to recharge my AC system which included adding freon with a special dye to detect leaks. That...
  14. No Air from dash vents, radio only from right front speaker

    General
    2008 Envoy 4.2L I-6 Radio - standard with CD player (Not Bose) Standard HVAC manulal controls No Air from dash vents, radio only from right front speaker Here’s my problem. Came out Saturday morning to go fishing. Started up and drove off – then realized the radio was only coming out of the...
  15. A/C thru floor vents when hot

    TrailBlazer / Envoy Chat
    I have an '03 TB with 85k, when I park the car in the sun and it gets hot the a/c will blow out of the floor vents for about 10 minutes. When the interior or the space behind the dash cools a little the vents on the center of the dash will come on. I have an LTZ with the automatic control...
  16. external temperature reading on a/c display is reading alot higher than actual temp

    General
    I have a 2004 trailblazer I just got and when using the a/c the ext temp on the display panel goes up rapidly. It reaches around 120 degrees and then toggles back and forth around that area. Where is this sensor located? Could it be bad? Also, when I turn off the truck you can hear a pinging...
  17. NO heat on cold days

    General
    Hi All I have been trying to figure out what is wrong with my HVAC system for a while but haven't been able to, I've read many post used the custom search but nothing yet. So I'm reaching out to fellow TB owners. Here's the gist: 2003 TB will kick out heat when temp outside is 50 and above but...
  18. Dash lighting up like a Christmas Tree!

    General
    Have a strange situation. My 04 LT all of a sudden in the middle of the day decided to light up the "Service 4WD", ABS, and brake warning lights on my dash. And both front and rear heaters stopped working. I have the dual manual heater controls (not the digital display). As far as I can tell the...
  19. Dual Auto temp control: Passenger/Driver controls reversed

    OEM Issues
    Hello all, I just bought an 04 Envoy, didn't notice it at the time, but the controls for the passenger/driver temp controls are reversed. When the left (driver side) knob is turned the display states the passenger temp is adjusted. When the right (passenger side) knob is turned the display...
  20. Having Blower Motor Problems, Please Help!!!

    Interior
    My blower motor recently quit working on my 02 trailblazer LT. My vehicle has the digital climate control. When I test the voltage across the male end of the connection that plugs directly into the blower motor I get between 0V (when the blower is turned off) and 5V (when the blower is on high)...
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